In situ synchrotron X-ray diffraction study of hydrides in Zircaloy-4 during thermomechanical cycling

Mahmut N. Cinbiz, Donald A. Koss, Arthur T. Motta, Jun Sang Park, Jonathan D. Almer

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

The d-spacing evolution of both in-plane and out-of-plane hydrides has been studied using in situ synchrotron radiation X-ray diffraction during thermo-mechanical cycling of cold-worked stress-relieved Zircaloy-4. The structure of the hydride precipitates is such that the δ{111} d-spacing of the planes aligned with the hydride platelet face is greater than the d-spacing of the 111 planes aligned with the platelet edges. Upon heating from room temperature, the δ{111} planes aligned with hydride plate edges exhibit bi-linear thermally-induced expansion. In contrast, the d-spacing of the (111) plane aligned with the hydride plate face initially contracts upon heating. These experimental results can be understood in terms of a reversal of stress state associated with precipitating or dissolving hydride platelets within the α-zirconium matrix.

Original languageEnglish (US)
Pages (from-to)247-259
Number of pages13
JournalJournal of Nuclear Materials
Volume487
DOIs
StatePublished - Apr 15 2017

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Nuclear Energy and Engineering

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